Statements (30)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
red supergiant |
| gptkbp:apparentMagnitude |
4.82
|
| gptkbp:catalogue |
gptkb:Henry_Draper_Catalogue
gptkb:Hipparcos_Catalogue gptkb:Bright_Star_Catalogue |
| gptkbp:declination |
+60° 13′ 58″
|
| gptkbp:diameter |
~400 solar radii
|
| gptkbp:discoveredBy |
gptkb:William_Herschel
|
| gptkbp:discoveredIn |
1786
|
| gptkbp:distanceFromEarth |
~5,000 light years
|
| gptkbp:evolutionaryStage |
post-red supergiant
|
| https://www.w3.org/2000/01/rdf-schema#label |
V509 Cephei
|
| gptkbp:locatedIn |
gptkb:constellation_Cepheus
|
| gptkbp:luminosity |
~330,000 times Sun
|
| gptkbp:mass |
~20 solar masses
|
| gptkbp:metallicity |
-0.2 [Fe/H]
|
| gptkbp:notableFor |
one of the largest known stars
|
| gptkbp:otherDesignation |
gptkb:HD_206936
gptkb:HIP_107259 HR 8313 |
| gptkbp:parallax |
0.65 mas
|
| gptkbp:properMotionRA |
-2.13 mas/yr
|
| gptkbp:radialVelocity |
-34 km/s
|
| gptkbp:rightAscension |
21h 44m 58.3s
|
| gptkbp:spectralType |
G5 Ia+
|
| gptkbp:temperature |
~8,500 K
|
| gptkbp:variableStar |
true
|
| gptkbp:bfsParent |
gptkb:Mu_Cephei
|
| gptkbp:bfsLayer |
7
|